To explore whether it is feasible to shorten the delayed film time of ultra-liquefied lipiodol hysterosalpingography.

After hysterosalpingography with ultra-liquefied lipiodol, pelvic delay films were taken at 3 hours,6 hours and 24 hours after operation to observe the residual lipiodol in the fallopian tube and judge the patency and function of the fallopian tube. Chi-square test was used to compare the differences in the degree of tubal patency diagnosed by taking delayed films at 3 h, 6 h, and 24 h after hysterosalpingography.

Chi-square test results showed that there was a statistically significant difference in the diagnostic results of delayed films at 3 hours, 6 hours, and 24 hours (P=0.002). There was no significant difference in the diagnostic results of delayed films between the two groups at the 3rd hour and the 6th hour (P=0.807). There were statistically significant differences in the diagnostic results between the delayed films taken at the 3rd or 6th hour and the delayed films taken at the 24th hour (P=0.001, P=0.006). In the case of tubal patency, there was no significant difference in diagnostic results between the delayed films taken at 3 hours, 6 hours and 24 hours (P=0.787). However, in the case of unobstructed fallopian tubes, delayed filming at 3 and 6 hours showed that some lipiodol residues in the fallopian tubes or local accumulation of lipiodol around the umbrella end indicated poor peristalsis, and delayed films at 24 hours miss fallopian tube function information (P=0.001, P=0.001). In the case of hydrosalpinx, the difference between the delayed film taken at the 3rd hour and the 6th hour and the delayed film taken at the 24th hour was statistically significant (P=0.010, P=0.015). In the case of fallopian tube obstruction, there was a statistically significant difference in the delay film between the 3rd hour and the 24th hour (P=0.003).

In the case of fallopian tube patency, the delayed film taken at the third hour can meet the diagnostic requirements and evaluate the fallopian tube function. In the case of hydrosalpinx and fallopian tube obstruction, it is more valuable to take a delayed film at 24 hours.